Install over arch?

Hello,
I'm investigating mageia. I have a system as follows: 4 partitions, /boot, /var, /home and /. The latter 3 are encrypted with dmcrypt-LUKS. I also have some 8GB unused areas on the drive. I wonder if I can install mageia as "/" into one of those and still use /var, /home and even maybe /boot. I am using grub legacy to boot. Can the installer handle something like this? Any advice will be appreciated, thanks.
I'm investigating mageia. I have a system as follows: 4 partitions, /boot, /var, /home and /. The latter 3 are encrypted with dmcrypt-LUKS. I also have some 8GB unused areas on the drive. I wonder if I can install mageia as "/" into one of those and still use /var, /home and even maybe /boot. I am using grub legacy to boot. Can the installer handle something like this? Any advice will be appreciated, thanks.